An asteroid could destroy humanity like it did dinosaurs. A Hopkins team has a plan to save the world.

By Tim Prudente A team of scientists, astronomers and engineers meets weekly in a conference room on a Howard County, Md., research campus and plans to save the world. “Keep calm and carry DART,” reads a poster on the wall. DART — the Double Asteroid Redirection Test — is their plan to avert catastrophe. It’s …